^^^ I wouldn't hold your breath. We'll be lucky if we get one more backwards compatibility update. They never intended to make "every game compatible" (or at least try to). They promised something they did not intend to deliver on to pull people in and get them to drop the cash, being confident their new system could play almost every game they had from the previous generation.
I know, some of you will say "IT'S ONLY BEEN A FEW MONTHS, YOU AREN'T MICROSOFT, YOU DON'T KNOW." Shut up.
I'd be glad if I were wrong, and I'll gladly come back here and say I was. But I won't be.